Mordent, grupeto, undocumented ornaments

I don't know if this has already been posted or documented, but I found -by accident- the following ornaments in Notion 4:
' + n = mordent
' + nn = grupeto
' + d = lower mordent
' + tt = Trill and mordent (not sure about this one, it's a classical ornament).
These ornaments don't change playback, they are only graphic. Still, very welcome (imo). Thank you guys.
About implementation of playback of these symbols, I would honestly prefer to be able to use hidden grace notes. This way I can fine tune exactly how I want my mordent or grupeto be played. But first I should be able to hide notes.
Best regards,
Emilio
' + n = mordent
' + nn = grupeto
' + d = lower mordent
' + tt = Trill and mordent (not sure about this one, it's a classical ornament).
These ornaments don't change playback, they are only graphic. Still, very welcome (imo). Thank you guys.
About implementation of playback of these symbols, I would honestly prefer to be able to use hidden grace notes. This way I can fine tune exactly how I want my mordent or grupeto be played. But first I should be able to hide notes.
Best regards,
Emilio